marshall



R. MARSHALL. PULP BBATING AND NEPINING ENGINE. No. 475,063. Patented May 1'7, 1892.

(No Model.)

UNITED STATES PATENT GFFICE.

EnwAEpffR. iiIAfnSnALL, oF TURNE-ES FALLS, MASSACHUSETTS, ASSIGNOR or oNEfHALETo FRANK J. MARSHALL, or SAME PLACE.

"PULBEA'TING AND REFINING eNelNi-z.

'SPECI'FCATION forming part of ALetters patent No. 475,063, dated Mayu?, .1892. 'Application filed May 25, 1891. Serial No. 393,973` (No model.)

T albwhom/ tf muy'concern/.w4

3e it'known-that I, EDWARD Ri MARSHALL, of 'lurners Falls, ,inl thcfc'o'unty of Franklin and State -ol Massachusetts, have 'invented a 5' new Improvement in Pulp Beating and Retining Engines; and `I do hereby declare the following, when taken in connection with ac'- com panyin g drawings and the letters of refervence marked thereon, to be a full, clear, and io exactdescri-ption'of the saine,and which said,

drawings constitute part of this specification, and-represent, in- 1 Figure 1, a longitudinal central section off a pulp-beating engine embodying the'iuvention; Fig. 2,.side vi'ew of the cone shell 'de tached; Fig. 3, transverse section of the shell; Figs. 4;, 5, and 6, detached views illustrating the--constructionuifihe renl'oablQ-lingsand;

cutters forthe supplemental beaters or cut-- 2o ters.

This in' that class of pulp-beating enginesin which the engine consistsv principallyof a frustumof-eone-shaped case provided'wit'h longitudi-l nalv ribs or cutters upon its inside,'combined with a correspondingly-shaped' cone arranged upon a shaft longitudinally through the Shell, the periphery of the cone provided with'longitndinal ribs or cutters adapted to co-oper-l 3o ate-with the ribs or cutters upon the inside ot the case and so that the ni-aterial introduced near the Smaller end otlthe case will work through lthecase towardfthe larger end and be cut or ground as it passes between the 3 5 revolving cone and the case toward the larger end of theA cone.

In patents granted to Frank J. Marshall, No. 342,802, "dated June 1, 1886, and also-No.A l111,251, granted to me September 17, 1889,

4o thereis combined with such an engine a stationary disk or'ringat the larger end of the cone, provided on its face .with cutters substantially radial-that is, at right' anglesto the axis vof the enginethe ring and its cuttels being-stationary asto their operation, and

combined with which Astationary ring-carry--v ing cutters is a revolving disk arranged upon" the same Shaft as the revolving cone Vof At'hef engine and So as to revolve therewith, the Said v 5o disk carrying on its face substantially radial invention relates to an improvememtl cutters corresponding .to the cutters on the Said ring, and so that as the' cut,v ground, or beaten material escapes- `froln the cone it passes between the said stationary-disk or ring and the revolving disk andv is further 55 cut or ground, this. revolving disk .and .Stationary ring operating,as'supplemental to the. engine. Itis to improvements in'thisvmachinethat myinvention particularly relates. In that machine the longitudinal cutters for 6o 'the inside of the case are attachedor secured directly to the interior of the case. vThe removal of the cutters or thereplacing thein or fitting is 'a diticult and expensive operation, and particularly is` this the casewh`en the 65 machine has been once set up. i

vThe object of the first part of iny'inventiou is to construct lthe rnachinet so thatthe stal fio na ry cutters 'or beaters of] the engine-case may be" readily removed and tlfttefdfinftlicr- 7o place independent of the'surroundiug case.-I

To this end the first part of :ny invention consists inthe arrangement oa shell within the main case of the engine and of the requi! site conical shape,'com'bined with aseres of 7 5 longitudinal vcutters arranged'v upon the inte-l rior of vsaid shell with keys or wedges betweensuccessive cutters, so asjto bind-the cutters upon theinterior ot`l the shell, the' said shell being removablysecurediwithin the-main case '8p of, the engine.

rl`he object lof these'cond part'ol:` rn'y inven-A tion isto construct th'ezring and revolving disk s0 that their radial cutters may be readj ily removed or replaced, as occasion may require, and this part of my invention consists in providing the stationary and Arevolving disks with supplemental rings, the'said -rings carrying the cutters,'and the Said rings re- A' 'movably secured to the revolving andstation- 9'0 ary disks, alias Vmore fully. hereinafter-defl scribed. y., f

A-represents thedialin` o'rvprincipal case of the engine. Itis of the usual conical shape, but ot' an increased diameterfromthat of the 95 usual construction. At itsv smaller end itis .provided with an opening lB for theigtroduction of` the materialt'o be opera ed `upon. Longitudinally and concentricall :through '.the'case a. shaft-C4 is arranged, 'supported in ro'o suitable bearings'D D, and to which power is appliedthrough-a. driving-'pulley E .on the shaft, or otherwise, and substantially as iu the patents before referred to. Within the caso A a shell F is arranged of like conical shape to the case. This shell is shown detached in Figs. 2 and At points on its circumference it is constructed with lugs or ribs G, which are adapted to take a bearing upon the interior of the case, and so that it may be secured therein by bolts II or otherwise, the bolts permitting the shell t-o-be introduced or removed through the. la-rger end of the case, but so that the shell may be firmly seated in the case as if practically a part of it.

Upon the inside of the shell F the cutters or beaters a are arranged. These are blades arranged longitudinally around the case at a shortdistance apart. To secure the blades, and so that they may stand-in substantially radial planes, they `are arranged upon the inside of the case, and between successive blades or cutters keys or binding-bars b are introduced the said bars or keys and blades, alternating, as seen in Fig. 3, and this series of cutters and bars-extends entirely around the interior of the shell E and so that by means of the bals all the cutters are firmly bound within the shell. Instead of making the series of blades and bars to be one continuous series around the shell abutments may be formed in the shell, as represented at d, Fig. 3 these abutments each tially to one of the binding-bars, and so that the blades with intermediate bars arranged between these abutments d d will be firmly bound between those abutments. Theshell is fitted with cutters or beaters before its in` troduction intol the case of the engine. It is consequently more conveniently handled and the blades are more' conveniently arranged than theycould be upon the inside of the case of the engine, and should it at anytime lbe necessary to removea portion ofthe blades. or replace one of said blades with anotherl the shell is easily taken from the case for this work, thus greatly facilitating repairs.

The shaft C is provided witha cone I, carrying a series ofrlongitu'dinal cutters or beaters e, substantially'asin the before-mentioned patents, and which co-ope'rate with the station-ary longitudinal blades to produce the grinding or beating the vsame as in the said patents.

Aroundthe larger end of the case of the engine a ring J is arranged, the plane of the face of the ring being at right angles to the axis of the engine. The said ring is adjustable longitudinally, but ,stationary circumferentially, as in the saidpatents, and upon the shaftC, outside the said ring J, a disk K isarranged to revolve plane of its revolution being parallel with the plane of the ring J. The adjacent faces of the ring or disk are provided with cutters to operate upon the material supplemental to the Work of thevengiue proper, as in the said patents; but instead of securing the cutters or beaters directly to the ring and disk, asin the corresponding substanwith the shaft, the

said patents, the cutters are arranged on independent rings detachably connected to the ring and disk. L represents the cutter ring for the ring J. In diameter it corresponds to the ring J and so as to set against its face,

as represented in Figs. l and .4, and is se- 5, g representing the keys, the grooves for the cutters and keysbeing thicker than'the cutter as the thickness of its key, and so that a cutter set in place the key may be driven home so as to removably secure the cutter 'to the ring, may be secured, as seen in Fig. 6, by setting one cutter, as .71., into a groove in the ring,`

and then at a distant point setting a second cutter, as t', into a like groove, so as to interlock with the ring, and then arranging the cutters, asf', between the said cutters h and i, and driving keys l between the respective cutters, as clearly seen in Fig. 6, it only being essential to the invention that the cutters shall be removablyattached ,to the removable rings. A cutter-ring L of like construction is removably attached to the disk, as seen `in Fig. 1.

At any time'wheuit is desired torepair or renew the cutters the cutter-rings may beremoved from the machine and such Work-couveniently performed.

In the illustration details of construction are shown substantially the same as in the before-mentioned patents, which do not .require description in this specification.

Frein the foregoing it will be understood that I claim nothing in this specification shown or described in either of the beforementioned patents-, but

made so much or the cutters What I do claim as `an improvement there-l on ls- In a pulp-beatingeugine consistiugof aconical case and a revolving shaft arranged longitudinally through the said case and carrying a corresponding cone, thecone constructed or provided on its surface with aseries of cut-- ters or beaters, the combination therewith of a correspondingly conicalshaped shell arranged withiuthe case and-around' the said cone, removably secured to said case, and the said shell 'provided with a series of lohgitudinal cutters or beaters adapted to co-operate with the'beaters or cutters on the surface of said con e, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses. v

EDWARD R. MARSHALL. Vitnesses:

FRED E. ALLEN, LEON O. Woon. 

